[Feat]: Hopefully there are javascript ui

### Is your feature request related to a problem? Please describe.

Now the ui is mesop with python which is not suitable for commercial companies to transform, adapt, and deploy.

### Describe the solution you'd like

It is hoped that the ui can be replaced with JavaScript so that commercial companies can better adapt to A2A.

### Describe alternatives you've considered

_No response_

### Additional context

_No response_

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct